If the SubtransactionAwareResource have been registered with a subtransaction
using the operation CosTransactions_Coordinator:register_subtran_aware/2,
it will be notified when the transaction has committed.

Note!

The results of a committed subtransaction are relative to the completion of its ancestor
transactions, that is, these results can be undone if any ancestor transaction is rolled back.

rollback_subtransaction(SubtransactionAwareResource) -> Return

SubtransactionAwareResource = #objref

Return = ok

If the SubtransactionAwareResource have been registered with a transactions
using the operation CosTransactions_Coordinator:register_subtran_aware/2
it will be notified when the transaction has rolled back.